i had this problem...heres what i did not sure if it will work for u
DONT! click any of the the Found new Hardware POP UPS(i did this and set up failed) let them stay there the setup will do this for u. DO! click the install button when it ask u to allow access to digidesign or watever the other popups say. try to trash any records u have of digidesign in ur registry and appdata and program data folders don't do the registry if u don't know what u are deleting because u can mess up other programs on ur pc this way but i did this before running my setup again after it failed on me also if u are going through the registry delete the PACE ANTI PIRACY folders they are separate from the digidesign folders.....
it says it in the setup background not to click the found new hardware pop ups hope this works for u